CN106643877A - Multi-sensing information fusion-based power transformer on-line monitoring system and method - Google Patents
Multi-sensing information fusion-based power transformer on-line monitoring system and method Download PDFInfo
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- CN106643877A CN106643877A CN201611018566.2A CN201611018566A CN106643877A CN 106643877 A CN106643877 A CN 106643877A CN 201611018566 A CN201611018566 A CN 201611018566A CN 106643877 A CN106643877 A CN 106643877A
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention discloses a multi-sensing information fusion-based power transformer on-line monitoring system and method. With the system and method adopted, online and real-time monitoring of a power transformer can be realized reliably, and vibration, current, voltage and switching quantity information can be acquired, processed, transmitted and analyzed reliably. The multi-sensing information fusion-based power transformer on-line monitoring system of the invention comprises a multi-sensor acquisition assembly; the multi-sensor acquisition assembly includes an acceleration sensor, a voltage sensor, a current sensor, a temperature sensor and a switching quantity acquisition sensor which are respectively used for acquiring the vibration information, voltage information, current information, temperature information and switching quantity information of the power transformer; an embedded master controller is an ARM embedded system-based master controller; a remote controller is a host computer; and the host computer uses SQL Server database software to carry out open database management.
Description
Technical field
The present invention relates to Power Transformer Monitoring System, monitors specifically for the operation conditions of power transformer.
Background technology
In the various equipment of power system, transformer is one of main equipment, and it directly affects whole electrical network
Operation conditions, its safe operation is significant for guarantee power equipment reliability service.
The monitoring function of traditional transformer monitoring systems is excessively single, typically only possesses electric current and voltage monitoring work(
Energy；When we have found that the importance of vibration monitoring, some prior arts measure vibration by installing vibrating sensor；But
There are very big actual techniques in the environment for actual 35kV or 75kV and more high pressure in this simple information gathering principle
Difficulty, some simple theories are known and finally cannot realize；
Chinese patent (Authorization Notice No. CN203573776U；Authorize public day 2014.04.30) disclose a kind of using biography
The 220kV transformers of sensor integral fusion technology；It is integrated with many information acquisition sensors, comprising electric current, voltage and shakes
Dynamic monitoring；But it is on a large scale transformed the structure of transformer, sensor is all placed in greatly inside transformer, and this is in actual behaviour
It is difficult to realize during control, because the destructive transformation of transformer is easily caused electric power safety operation standard is not reached, and
The reliability of transformer itself there is problem, and in such cases, monitoring is nonsensical, and monitoring allows on the contrary transformer more to hold
Easily go wrong, do not have the effect of containment problem generation；
In above-mentioned patent, for information gathering after further process without reference to but for the reliable treatments of information
It is again highly important with transmission, we are in practice of construction, it was found that basic using existing wired data transmission technology
Cannot use at the scene, excessive wire harness introduces more uncertain factors, simultaneously because 75kV and above specification electric power become
The electromagnetic interference of depressor is larger, and the conventional mounting structure similar to above-mentioned patent cannot realize reliable and stable operation；For this
A little defects, are all to need creative brand-new comprehensive consideration design.
The content of the invention
The technical problem to be solved is for above-mentioned deficiency of the prior art, there is provided one kind is based on many biographies
The power transformer on-line monitoring system and method for sense information fusion；It can realize that reliable power transformer is supervised in real time online
Survey, can reliably gather, process, transmit and analyze vibration, electric current, voltage and switching value information；Possesses reliable promotion prospect.
In order to achieve the above object, the power transformer on-line monitoring system based on multi-sensor data fusion disclosed by the invention
System, it employs the following technical solutions and is achieved：
Based on the power transformer on-line monitoring system of multi-sensor data fusion, comprising multi-sensor collection component；It is described
Multi-sensor collection component includes vibration information, information of voltage, current information, the temperature letter for being respectively used to collection power transformer
Breath and the acceleration transducer of switching value information, voltage transformer, current sensor, temperature sensor and switch acquisition sensing
Device；
Also it is connected with acquisition and conditioning circuit comprising multi-sensor collection component；The acquisition and conditioning circuit is connected with A/D module
Change-over circuit；The A/D module change-over circuit is led to by radio-frequency transmitter module with the wireless radiofrequency receiver module of monitoring field
News；The wireless radiofrequency receiver module is connected to embedded main controller, and embedded main controller is by 4G communication modules and distal end
Remote controllers are communicated；Embedded main controller also connects touch screen human-computer interface by RS232/RS485 interfaces；
The embedded main controller is the main controller based on ARM embedded systems；The remote controllers are upper calculating
Machine；The host computer carries out open type data library management, the host computer with SQL Server database software
On be stored with different type power transformer vibration noise noise source determine and time-frequency characteristic model；
Above-mentioned acceleration transducer is distributed in three-phase primary windings and three-phase secondary windings；Upper, middle and lower per phase winding
Position respectively mounts an acceleration transducer at three, and the acceleration transducer is popped one's head in and attachment screw comprising acceleration, is accelerated
Degree sensor is assembled in magnetic force mounting seat by attachment screw, and the magnetic force mounting seat adopts the permanent magnet magnet of insulation against ground
Absorption is on power transformer；The permanent magnet surfaces coat one layer of insulated paint；
The acquisition and conditioning circuit includes operational amplifier and wave filter；The electricity of the charge amplifier of the operational amplifier
Source line and power transformer casing are in a distance or two power lines of charge amplifier are arranged in right-angled intersection；
The signal ground of acceleration transducer, the power ground of power supply and sensor casing shielding earth are drawn respectively
One point earth in parallel afterwards；The acceleration transducer is ICP sensors, and is powered using constant current source power supply mode.
As a kind of preferred embodiment of the above-mentioned power transformer on-line monitoring system based on multi-sensor data fusion：
The different type power transformer is 6kV, 10kV, 35kV and 75kV power transformer；The acceleration transducer is
AD50T-T or AD1000T；The touch screen human-computer interface is 5～7 cun of touch screen human-computer interfaces；The RS485 interfaces pass through light
Electric isolator carries out signal isolation.
As a kind of preferred embodiment of the above-mentioned power transformer on-line monitoring system based on multi-sensor data fusion：
The host computer operation has wireless vibration online-monitoring software；The wireless vibration online-monitoring software is to the number that collects
Show, historical data management and auto report feature be provided according to vibration parameters calculating, realtime curve, trend data is carried out,
Simultaneously abnormal vibration or it is exceeded in the case of carry out alarm.
As a kind of preferred embodiment of the above-mentioned power transformer on-line monitoring system based on multi-sensor data fusion：
The current sensor is the open-close type current sensing for gathering primary, the secondary electric current of the three-phase windings of power transformer
Device；The voltage transformer is the voltage transformer for gathering power transformer three-phase windings primary, secondary voltage；The temperature
Degree sensor is the temperature sensor for gathering the temperature of electric transformer radiator；All acceleration transducers are connected to just
The secondary acceleration signal acquisition and conditioning circuit of level；All current sensors and voltage transformer are connected to primary secondary voltage electric current
Signal collection modulation circuit；All temperature sensors are connected to primary secondary tank temperature collection signal collection modulation circuit；Institute
There is switch acquisition sensor to be connected to switch acquisition modulate circuit；
Above-mentioned primary secondary acceleration signal acquisition and conditioning circuit, primary secondary voltage current signal acquisition and conditioning circuit,
Primary secondary tank temperature collection signal collection modulation circuit and switch acquisition modulate circuit are connected to A/D module conversion
Circuit.
As a kind of preferred embodiment of the above-mentioned power transformer on-line monitoring system based on multi-sensor data fusion：
All acceleration transducers are connected by 24 road acceleration signal lines with primary secondary acceleration signal acquisition and conditioning circuit；It is described
The quantity of voltage transformer is six；The quantity of current sensor is six；The quantity of the temperature sensor is 8；It is described
Switch acquisition sensor is 8；The primary secondary acceleration signal acquisition and conditioning circuit carries out the using instrument amplifier
One stage signal is received and amplified, the signal exported to instrument amplifier using second-order low-pass filter or third-order low-pass filter
It is filtered, cut-off frequency is designed in 2KHz；The primary secondary voltage current signal acquisition and conditioning circuit is entered using emitter follower
Row first order signal receives matching treatment；The temperature sensor is Pt100 or AD590 sensors；AD590 sensors are corresponding
Signal amplification is carried out using OP07 in primary secondary, tank temperature signal collection modulation circuit；The embedded master controller and
4G communication modules are by the insulating power supply module for power supply with charging system.
As a kind of preferred embodiment of the above-mentioned power transformer on-line monitoring system based on multi-sensor data fusion：
The host computer is also connected with the watch-dog wireless telecommunications of the Control Room of power transformer.
As a kind of preferred embodiment of the above-mentioned power transformer on-line monitoring system based on multi-sensor data fusion：
The upper PCs are also stored with the background information of power transformer；The background information of the power transformer includes transformation
The capacity of device, electric pressure, model, infield, put into operation time and maintenance usage record.
The invention also discloses the power transformer on-line monitoring method based on multi-sensor data fusion, it adopts above-mentioned
Arbitrary power transformer on-line monitoring system based on multi-sensor data fusion performs following steps：
(1) system initialization；
(2) host computer sends to embedded main controller and is wirelessly transferred instruction；
(3) embedded main controller judges to be wirelessly transferred whether the instruction for coming is native instructions, if it is execution step
(4)；
(4) measurement is started；Really measurement whether is started, if it is, performing measurement collecting flowchart；If otherwise perform sentenced
It is disconnected to continue measurement procedure；
The measurement collecting flowchart is launched to host computer comprising collection signal, signal condition, AD conversion, Signal coding
The step of；
It is described to judge to continue measurement procedure comprising judging whether to continue to measure, if it is, perform above-mentioned performing measurement
Collecting flowchart；If it is not, then judging whether that measurement terminates；Terminate measurement if measurement terminates；If measurement is not over
Return instruction malfunctions, and working method is applied for again.
Beneficial effects of the present invention：
The present invention includes multi-sensor collection component；The multi-sensor collection component becomes comprising collection electric power is respectively used to
Acceleration transducer, the mutual induction of voltage of the vibration information of depressor, information of voltage, current information, temperature information and switching value information
Device, current sensor, temperature sensor and switch acquisition sensor；The acceleration of the present invention is mounting structure, without the need for destruction
Transformer body structure；The present invention gathers vibration information by acceleration transducer, and (especially piezoelectric type adds acceleration transducer
Velocity sensor) small volume, lightweight, fixing resonance frequency is higher, there is enough frequency ranges, is especially suitable for the vibration of the present invention
Information gathering scheme.
Signal type, power, excursion difference in view of the collection of each type of sensor also than larger, therefore
For different sensors, we have been respectively configured signal collection modulation circuit.The acquisition and conditioning circuit is connected with A/D module and turns
Change circuit；The A/D module change-over circuit is led to by radio-frequency transmitter module with the wireless radiofrequency receiver module of monitoring field
News；The wireless radiofrequency receiver module is connected to embedded main controller, and embedded main controller is by 4G communication modules and distal end
Remote controllers are communicated；Embedded main controller also connects touch screen human-computer interface by RS232/RS485 interfaces；Signals collecting is adjusted
Reason circuit will be transmitted after small-signal amplification, filtering so that subsequent treatment work reliably can be completed fast；What the present invention was adopted
Signal transmission is using being wirelessly transferred, it is to avoid the signal interference of the complex arrangement of excessive wire harness and excessive wire harness；Embedded master
Control device is arranged on test site, and (embedded main controller can be placed in on-site supervision room by Long-Time Service, interim test, can be only
It is placed on test site), the host computer of more distal end is transferred to by 4G communications, can immediately upload information；
The embedded main controller of the present invention is the main controller based on ARM embedded systems；The remote controllers are upper
Computer；The host computer carries out open type data library management, the upper meter with SQL Server database software
The noise source of the vibration noise of the different type that is stored with calculation machine power transformer determines and time-frequency characteristic model；The present invention passes through
The powerful software and hardware function of ARM system, the transmission of data acquisition, analysis and gathered data.Host computer passes through SQL
Server database software carry out open type data library management, and for transformer vibration measurement analysis incremental software pipe is provided
Reason pattern；With the corresponding data model of the relation, multi-sensor information and transformer fault mutual to multi-sensor information
Gradual perfection, be capable of the very accurate monitoring analysis defect of reliable intelligence；So that defect is prevented in advance.
The acceleration transducer of the present invention is distributed in three-phase primary windings and three-phase secondary windings；Per phase winding it is upper in
Position respectively mounts an acceleration transducer at lower three, and the acceleration transducer is popped one's head in and attachment screw comprising acceleration, plus
Velocity sensor is assembled in magnetic force mounting seat by attachment screw, and the magnetic force mounting seat adopts the permanent magnet magnetic of insulation against ground
Iron adsorbs on power transformer；The permanent magnet surfaces coat one layer of insulated paint；The acceleration transducer distribution position of the present invention
Put rationally, reliably can comprehensively gather vibration information；Mounting structure is reliably convenient, while it also avoid to transformer body structure
Damage；The insulation system of acceleration transducer defines reliably floating ground structure, is prevented from Hz noise；Pacified using magnetic force
The other advantage of dress seat can be to be easy to remove after measurement is finished, and this just considerably increases the portability of whole monitoring system.
The acquisition and conditioning circuit of the present invention includes operational amplifier and wave filter；The charge amplifier of the operational amplifier
Power line and power transformer casing in a distance or two power lines of charge amplifier are arranged in right-angled intersection；
This structure is prevented from distribution capacity between wire and casing and introduces Hz noise, and this should 75kV and above power transformer
It is extremely important with, reliability service can be ensured；
The signal ground of acceleration transducer of the present invention, the power ground of power supply and sensor casing shielding earth
One point earth in parallel after drawing respectively；The acceleration transducer is ICP sensors, and is powered using constant current source power supply mode.
One point earth in parallel ensure that whole monitoring system is not disturbed by ground potential floating, the present invention by external electromagnetic interference
Jing has been down in the scope required by monitoring system precision；When the system can be with reliable and stable operation in high-tension electricity transformer
When, for existing low-tension transformer then can be promoted the use of reliably very much.
Description of the drawings
Fig. 1 is that one kind of power transformer on-line monitoring system and method for the present invention based on multi-sensor data fusion is concrete
The circuit structure theory diagram of embodiment；
Fig. 2 is a kind of specific embodiment party of the present invention based on the power transformer on-line monitoring method of multi-sensor data fusion
The flow chart of formula.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment describes the specific embodiment of the invention：
As illustrated, the specific embodiment of the present invention is it illustrates, as shown in figure 1, disclosed by the invention based on many biographies
The power transformer on-line monitoring system of sense information fusion, comprising multi-sensor collection component；The multi-sensor collection component
Comprising vibration information, information of voltage, current information, temperature information and the switching value information for being respectively used to collection power transformer
Acceleration transducer, voltage transformer, current sensor, temperature sensor and switch acquisition sensor；
Also it is connected with acquisition and conditioning circuit comprising multi-sensor collection component；The acquisition and conditioning circuit is connected with A/D module
Change-over circuit；The A/D module change-over circuit is led to by radio-frequency transmitter module with the wireless radiofrequency receiver module of monitoring field
News；The wireless radiofrequency receiver module is connected to embedded main controller, and embedded main controller is by 4G communication modules and distal end
Remote controllers are communicated；Embedded main controller also connects touch screen human-computer interface by RS232/RS485 interfaces；
The embedded main controller is the main controller based on ARM embedded systems；The remote controllers are upper calculating
Machine；The host computer carries out open type data library management, the host computer with SQL Server database software
On be stored with different type power transformer vibration noise noise source determine and time-frequency characteristic model；
Above-mentioned acceleration transducer is distributed in three-phase primary windings and three-phase secondary windings；Upper, middle and lower per phase winding
Position respectively mounts an acceleration transducer at three, and the acceleration transducer is popped one's head in and attachment screw comprising acceleration, is accelerated
Degree sensor is assembled in magnetic force mounting seat by attachment screw, and the magnetic force mounting seat adopts the permanent magnet magnet of insulation against ground
Absorption is on power transformer；The permanent magnet surfaces coat one layer of insulated paint；
The acquisition and conditioning circuit includes operational amplifier and wave filter；The electricity of the charge amplifier of the operational amplifier
Source line and power transformer casing are in a distance or two power lines of charge amplifier are arranged in right-angled intersection；
The signal ground of acceleration transducer, the power ground of power supply and sensor casing shielding earth are drawn respectively
One point earth in parallel afterwards；The acceleration transducer is ICP sensors, and is powered using constant current source power supply mode.
Above-mentioned " noise source of the vibration noise of power transformer determines and time-frequency characteristic model " be through long term accumulation not
Disconnected perfect database；Such as, for the noise source of oscillating component determines part, by vibration characteristics during zero load and load when
The mode of vibration (such as vibration frequency) that vibration characteristics carries out counting perfect, common corresponds to specific fault message or hidden danger
(through we have discovered that, vibration of the vibration frequency less than 100Hz, concentration is the fundamental vibration caused by cooling system；Transformation
The frequency of device vibration is the vibration that 100Hz is fundamental frequency；The mutation of Current Voltage, causes basket vibration to sharply increase)；With number
According to the perfect of storehouse, its deterministic process is more intelligent, precisely and quick；Above-mentioned time-frequency characteristic model is us using time domain point
The theoretical model that the mode of analysis, frequency-domain analysis and Time-Frequency Analysis comprehensive analysis draws.
Preferably：The different type power transformer is that (this four kinds are not or not 6kV, 10kV, 35kV and 75kV power transformer
The usage amount of the power transformer of same specification is big, realizes contributing to this to the on-line monitoring of the power transformer of four kinds of specifications
Bright large-scale promotion)；The acceleration transducer is AD50T-T or AD1000T；The touch screen human-computer interface is 5～7 cun
Touch screen human-computer interface；The RS485 interfaces carry out signal isolation by photoisolator, can thoroughly eliminate common-mode voltage
Affect.
Preferably：The host computer operation has wireless vibration online-monitoring software；The wireless vibration on-line monitoring
Software carries out vibration parameters calculating, realtime curve, trend data to the data for collecting and shows, provides historical data management
And auto report feature, while abnormal vibration or it is exceeded in the case of carry out alarm.
Preferably, as shown in the figure：The current sensor is primary, secondary for gathering the three-phase windings of power transformer
Electric current open-close type current sensor；The voltage transformer is primary, secondary for gathering power transformer three-phase windings
The voltage transformer of voltage；The temperature sensor is the temperature sensor for gathering the temperature of electric transformer radiator；
All acceleration transducers are connected to primary secondary acceleration signal acquisition and conditioning circuit；All current sensors and mutual induction of voltage
Device is connected to primary secondary voltage current signal acquisition and conditioning circuit；All temperature sensors are connected to primary secondary tank temperature
Collection signal collection modulation circuit；All switch acquisition sensors are connected to switch acquisition modulate circuit；
Above-mentioned primary secondary acceleration signal acquisition and conditioning circuit, primary secondary voltage current signal acquisition and conditioning circuit,
Primary secondary tank temperature collection signal collection modulation circuit and switch acquisition modulate circuit are connected to A/D module conversion
Circuit.
Preferably, as shown in the figure：All acceleration transducers are by 24 road acceleration signal lines and primary secondary acceleration
Signal collection modulation circuit connects；The quantity of the voltage transformer is six；The quantity of current sensor is six；The temperature
The quantity of degree sensor is 8；The switch acquisition sensor is 8；The primary secondary acceleration signal collection conditioning
Circuit carries out the reception of first order signal and amplification using instrument amplifier, is filtered using second-order low-pass filter or third-order low-pass
Device is filtered to the signal that instrument amplifier is exported, and cut-off frequency is designed in 2KHz, and instrument amplifier has high common mode inhibition
Than, high input impedance, low noise, low linearity error, low offset drift, gain arranges the characteristic such as flexibly；The primary secondary electrical
Current voltage signal collection modulation circuit carries out first order signal and receives matching treatment using emitter follower, and emitter follower has very high defeated
Enter impedance and very low output impedance characteristic；The temperature sensor is Pt100 or AD590 sensors；AD590 sensors correspondence
Primary is secondary, carry out signal amplification using OP07 in tank temperature signal collection modulation circuit, the output of AD590 sensors is
Current signal, is converted into voltage signal by current signal first, then carries out signal amplification from the amplifier of high input impedance；Institute
Embedded master controller and 4G communication modules are stated by the insulating power supply module for power supply with charging system, using insulating power supply to confession
Electricity, it is ensured that voltage ripple of power network and surge etc. do not produce any impact to the system, it is ensured that the normal work of system, keep away
False alarm is exempted from.
Preferably, as shown in the figure：The host computer also with the watch-dog wireless telecommunications of the Control Room of power transformer
Connection.Control Room is the power distribution equipment that existing remotely control monitors transformer, and current transformer terminal and Control Room end is mutual
Independent structure, the situation of transformer is difficult the very first time and is accurately reflected into Control Room, and Control Room can only view conventional
Running parameter, for fault message is not previously predicted completely and instant control function；By the present embodiment, host computer can be by
Fault message or fault pre-alarming information are sent to Control Room, and Control Room is can be known failure cause, process immediately.
Preferably：The upper PCs are also stored with the background information of power transformer；The power transformer
Background information is comprising the capacity of transformer, electric pressure, model, infield, put into operation time and maintenance usage record.These
Parameter is larger for the effect of accident analysis, storage can update immediately, the database of final Erecting and improving.
As shown in Figure 2：The invention also discloses the power transformer on-line monitoring method based on multi-sensor data fusion, its
Following steps are performed using above-mentioned arbitrary power transformer on-line monitoring system based on multi-sensor data fusion：
(1) system initialization；
(2) host computer sends to embedded main controller and is wirelessly transferred instruction；
(3) embedded main controller judges to be wirelessly transferred whether the instruction for coming is native instructions, if it is execution step
(4)；Due to being the mode being wirelessly transferred, method disclosed by the invention enables to instruction and obtains reliable recognition.
(4) measurement is started；Really measurement whether is started, if it is, performing measurement collecting flowchart；If otherwise perform sentenced
It is disconnected to continue measurement procedure；
The measurement collecting flowchart is launched to host computer comprising collection signal, signal condition, AD conversion, Signal coding
The step of；
It is described to judge to continue measurement procedure comprising judging whether to continue to measure, if it is, perform above-mentioned performing measurement
Collecting flowchart；If it is not, then judging whether that measurement terminates；Terminate measurement if measurement terminates；If measurement is not over
Return instruction malfunctions, and working method is applied for again.
Monitoring method disclosed above, on the basis of possessing the corresponding advantage of monitoring system, fast can reliably transport
OK, real-time malfunction monitoring is finally realized.
It should be noted that the vibration information, current information, information of voltage, switching value information and temperature with regard to transformer
Information We conducted prolonged research for the effect of transformer fault, and the content of these researchs will be enriched the very first time
The database of host computer, can aid in the present invention and makes accurate, instant, reliable, quick and intelligent fault pre-alarming；This
A little research contents are including but not limited to following content：
First, the main producing cause of power transformer vibration：
1st, the iron core periodic vibration that the magnetostriction of silicon steel sheet causes；
1.1 due to the half period of magnetostrictive period of change exactly supply frequency, so what magnetostriction caused
The vibration noise of transformer body, it with the supply frequency of twice is its fundamental frequency to be, i.e. the frequency of transformer vibration is that 100Hz is
The vibration of fundamental frequency.
1.2 is different with the section of iron yoke corresponding stage due to magnetostrictive non-linear, multistage newel unshakable in one's determination, and along iron
Intracardiac frame is different with the magnetic-path length of housing etc., causes magnetic flux to clearly deviate from sine wave, that is, have higher hamonic wave
Component is present.
Therefore in rumble spectrum unshakable in one's determination in addition to having fundamental vibration noise, its frequency is also included for fundamental frequency integral multiple
High frequency extraneous vibration noise.
2nd, the electromagnetic attraction produced because of leakage field is there is between silicon steel sheet seam crossing and lamination, the iron core for causing shakes
It is dynamic；
When 2.1 electric currents pass through winding, the winding that the dynamic leakage field power produced between winding, between line cake, between wire turn causes
Vibration.The amplitude direct ratio of transformer winding vibration acceleration and load current square, vibration frequency is power frequency (power frequency)
2 times, i.e. 100Hz；
The vibration of the oil tank wall (including magnetic screen etc.) that 2.2 leakage fields cause；
Vibration of 2.3 vibration frequencies less than 100Hz, concentration is the fundamental vibration caused by cooling system；
3rd, direct current factor；
3.1 geomagnetic induction currents (0.001～0.1Hz of frequency) and direct current transportation earth current with DC characteristic are flowed into
Transformer forms D.C. magnetic biasing, and these direct current fluxes cause the serious saturation of transformer core, serious magnetic saturation to make with vibration
The loss of transformer hardware increases, and destruction insulation, ageing equipment reduces service life.The transformer under the influence of D.C. magnetic biasing
Obvious noise increase phenomenon is presented, the status monitoring of vibration noise is contributed to from the angle of system operation and equipment safety
The harm of researching DC magnetic bias, by the monitoring to vibration noise the analyzing and diagnosing of unusual condition is carried out, and is provided for theory analysis
Authentic data.
3.2 transformer neutral points flow into DC current and produce obvious abnormal vibrations noise, and this is also that people are primarily upon
Problem, many documents all give analysis according to (exciting current occurs in that significantly distortion when there is DC component to flow into, and makes
Transformer core generating period saturation, causes the increase [3] of noise level), but with reference to bias current impact to transformation
The monitoring analysis of device vibration noise is still far from perfect.
2nd, the decisive factor of power transformer vibration
(1) vibration of winding is that the leakage field produced by load current causes, and the nominal operation magnetic flux of transformer generally takes
1.5T-1.8T (tesla), both at home and abroad research shows, in the magnetic flux, winding, fuel tank that the leakage field that load current is produced causes
The vibration of wall, with the constantly improve of transformer manufacturing technique, because of electromagnetic attraction between silicon steel sheet seam crossing and lamination, causes
Core vibration, the core vibration caused with the magnetostriction of silicon steel sheet is much smaller, is negligible.Therefore, transformer
When being operated in 1.5T-1.8T (tesla) nominal operation magnetic flux, the vibration of transformer depends primarily on the magnetostriction of silicon steel sheet
The periodic vibration of the iron core for causing；
(2) use with the high magnetic conduction silicon steel sheet (such as the B silicon steel sheets of Hi mono-) of super orientation in transformer manufacturing, Yi Jitie
The improvement of core structure design, the close reduction of iron core work magnetic, the basket vibration that the leakage field that load current is produced causes is greatly increased,
The size of this vibration and load current square are directly proportional.Particularly nominal operation magnetic it is close less than 1.4T when, winding shakes
The dynamic vibration that can even exceed the transformer that magnetostriction unshakable in one's determination causes；
(3) mutation of Current Voltage, causes basket vibration to sharply increase；
(4) relation between transformer core and the operating mode and its magnitude of vibrations of winding：
The screw of fastening iron core.When loosening, the thrust of silicon steel sheet weakens, piece is shown in that gap becomes big, and iron core shakes
It is dynamic also just to increase.Silicon steel sheet deforms or bends, and the electromagnetic attraction between silicon steel sheet also will increase, and the vibration of iron core is also
Increase.When being short-circuited or during multipoint earthing of iron core, the temperature of iron core can be raised quickly, and by causing, the magnetostriction of silicon steel sheet is fast
Speed increase, the vibration of iron core also just increases.If Transformer Winding occurs loosening phenomenon, the vibration of winding will increase.
The preferred embodiment for the present invention is explained in detail above in conjunction with accompanying drawing, but the invention is not restricted to above-mentioned enforcement
Mode, in the ken that those of ordinary skill in the art possess, can be with the premise of without departing from present inventive concept
Make a variety of changes, these changes are related to correlation technique well-known to those skilled in the art, and these both fall within patent of the present invention
Protection domain.
Many other changes and remodeling can be made without departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.
Claims (8)
1. the power transformer on-line monitoring system of multi-sensor data fusion is based on, it is characterised in that：Comprising multi-sensor collection
Component；The multi-sensor collection component includes vibration information, information of voltage, the electric current letter for being respectively used to collection power transformer
Breath, the acceleration transducer of temperature information and switching value information, voltage transformer, current sensor, temperature sensor and switch
Amount collection sensor；
Also it is connected with acquisition and conditioning circuit comprising multi-sensor collection component；The acquisition and conditioning circuit is connected with A/D module conversion
Circuit；The A/D module change-over circuit is communicated by radio-frequency transmitter module with the wireless radiofrequency receiver module of monitoring field；
The wireless radiofrequency receiver module is connected to embedded main controller, and embedded main controller is long-range with distal end by 4G communication modules
Controller communication；Embedded main controller also connects touch screen human-computer interface by RS232/RS485 interfaces；
The embedded main controller is the main controller based on ARM embedded systems；The remote controllers are host computer；Institute
State host computer carries out open type data library management with SQL Server database software, stores on the host computer
The noise source for having the vibration noise of different type power transformer determines and time-frequency characteristic model；
Above-mentioned acceleration transducer is distributed in three-phase primary windings and three-phase secondary windings；At upper, middle and lower three per phase winding
Position respectively mounts an acceleration transducer, and the acceleration transducer is popped one's head in and attachment screw comprising acceleration, and acceleration is passed
Sensor is assembled in magnetic force mounting seat by attachment screw, and the magnetic force mounting seat adopts the permanent magnet magnet adsorption of insulation against ground
On power transformer；The permanent magnet surfaces coat one layer of insulated paint；
The acquisition and conditioning circuit includes operational amplifier and wave filter；The power line of the charge amplifier of the operational amplifier
With power transformer casing in a distance or charge amplifier two power lines in right-angled intersection arrange；
The signal ground of acceleration transducer, the power ground of power supply and sensor casing shielding earth draw respectively after simultaneously
Connection one point earth；The acceleration transducer is ICP sensors, and is powered using constant current source power supply mode.
2. the power transformer on-line monitoring system of multi-sensor data fusion is based on as claimed in claim 1, it is characterised in that：
The different type power transformer is 6kV, 10kV, 35kV and 75kV power transformer；The acceleration transducer is
AD50T-T or AD1000T；The touch screen human-computer interface is 5～7 cun of touch screen human-computer interfaces；The RS485 interfaces pass through light
Electric isolator carries out signal isolation.
3. the power transformer on-line monitoring system of multi-sensor data fusion is based on as claimed in claim 1, it is characterised in that：
The host computer operation has wireless vibration online-monitoring software；The wireless vibration online-monitoring software is to the number that collects
Show, historical data management and auto report feature be provided according to vibration parameters calculating, realtime curve, trend data is carried out,
Simultaneously abnormal vibration or it is exceeded in the case of carry out alarm.
4. the power transformer on-line monitoring system of multi-sensor data fusion is based on as claimed in claim 1, it is characterised in that：
The current sensor is the open-close type current sensing for gathering primary, the secondary electric current of the three-phase windings of power transformer
Device；The voltage transformer is the voltage transformer for gathering power transformer three-phase windings primary, secondary voltage；The temperature
Degree sensor is the temperature sensor for gathering the temperature of electric transformer radiator；All acceleration transducers are connected to just
The secondary acceleration signal acquisition and conditioning circuit of level；All current sensors and voltage transformer are connected to primary secondary voltage electric current
Signal collection modulation circuit；All temperature sensors are connected to primary secondary tank temperature collection signal collection modulation circuit；Institute
There is switch acquisition sensor to be connected to switch acquisition modulate circuit；
Above-mentioned primary secondary acceleration signal acquisition and conditioning circuit, primary secondary voltage current signal acquisition and conditioning circuit, primary
Secondary tank temperature collection signal collection modulation circuit and switch acquisition modulate circuit are connected to A/D module change-over circuit.
5. the power transformer on-line monitoring system of multi-sensor data fusion is based on as claimed in claim 4, it is characterised in that：
All acceleration transducers are connected by 24 road acceleration signal lines with primary secondary acceleration signal acquisition and conditioning circuit；It is described
The quantity of voltage transformer is six；The quantity of current sensor is six；The quantity of the temperature sensor is 8；It is described
Switch acquisition sensor is 8；The primary secondary acceleration signal acquisition and conditioning circuit carries out the using instrument amplifier
One stage signal is received and amplified, the signal exported to instrument amplifier using second-order low-pass filter or third-order low-pass filter
It is filtered, cut-off frequency is designed in 2KHz；The primary secondary voltage current signal acquisition and conditioning circuit is entered using emitter follower
Row first order signal receives matching treatment；The temperature sensor is Pt100 or AD590 sensors；AD590 sensors are corresponding
Signal amplification is carried out using OP07 in primary secondary, tank temperature signal collection modulation circuit；The embedded master controller and
4G communication modules are by the insulating power supply module for power supply with charging system.
6. the power transformer on-line monitoring system of multi-sensor data fusion is based on as claimed in claim 1, it is characterised in that：
The host computer is also connected with the watch-dog wireless telecommunications of the Control Room of power transformer.
7. the on-line monitoring system of the power transformer of multi-sensor data fusion is based on as claimed in claim 1, and its feature exists
In：The upper PCs are also stored with the background information of power transformer；The background information of the power transformer is included
The capacity of transformer, electric pressure, model, infield, put into operation time and maintenance usage record.
8. the power transformer on-line monitoring method of multi-sensor data fusion is based on, and it is adopted as described in claim 1～7 is arbitrary
Based on multi-sensor data fusion power transformer on-line monitoring system perform following steps：
(1) system initialization；
(2) host computer sends to embedded main controller and is wirelessly transferred instruction；
(3) embedded main controller judges to be wirelessly transferred whether the instruction for coming is native instructions, if it is execution step (4)；
(4) measurement is started；Really measurement whether is started, if it is, performing measurement collecting flowchart；If otherwise perform judge after
Continuous measurement procedure；
The measurement collecting flowchart is launched to the step of host computer comprising collection signal, signal condition, AD conversion, Signal coding
Suddenly；
It is described to judge to continue measurement procedure comprising judging whether to continue to measure, if it is, performing above-mentioned execution measurement collection
Flow process；If it is not, then judging whether that measurement terminates；Terminate measurement if measurement terminates；Return if measurement is not over
Instruction error, applies for working method again.
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| CN201611018566.2A CN106643877A (en) | 2016-11-18 | 2016-11-18 | Multi-sensing information fusion-based power transformer on-line monitoring system and method |
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| CN108414077A (en) * | 2018-02-06 | 2018-08-17 | 武汉理工大学 | One kind detecting alarm system based on monolithic processor controlled transformer noise |
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| CN111948528A (en) * | 2019-05-16 | 2020-11-17 | 株式会社日立制作所 | Diagnostic method and device for opening and closing device |
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| CN110375846A (en) * | 2019-08-14 | 2019-10-25 | 杭州柯林电气股份有限公司 | Perceive the device of vocal print vibration inline diagnosis power transformer interior fault |
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| CN113759158A (en) * | 2021-07-26 | 2021-12-07 | 国家电网有限公司 | Mutual inductor for multi-node station domain information fusion and data acquisition method |
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